Sunforce 45444 600W Wind Turbine Charges both 12V and 24V battery banks Ideal for remote locations, cottages and backup-power needs Operates in wind as low as 4MPH Weatherproof industrial-strength design with low noise fiberglass blades Includes: turbine, (3) blades, a safe and highly-efficient MPPT charge controller for optimized charging, hub, vertical tail, nose cone, amp meter, screw pack, replacement screw pack